干旱区生态环境知识资源中心(Arid): 埃塞俄比亚低海拔区灌丛化草地动态变化

Arid

	埃塞俄比亚低海拔区灌丛化草地动态变化
其他题名	Dynamic Changes of the Bush Encroachment in Low Altitude Area of Ethiopia
	邢媛媛 ; 王永东 ; 尤源 ; 宋勤
来源期刊	资源与生态学报
ISSN	1674-764X
出版年	2018
卷号	9 期号:3 页码:281-289
中文摘要	灌丛化草地广泛分布于干旱半干旱区,严重影响当地畜牧业发展,尤其是以牧业为主要生活来源的非洲国家。本文基于埃塞俄比亚低海拔区1986-2016年的遥感影像,通过监督分类和决策树分类方法,运用单一土地变化动态度和土地利用变化重要性指数(Ci),研究了埃塞俄比亚低海拔区灌丛化草地30年不同程度灌丛化草地动态变化特征,研究结果可为揭示低海拔区灌丛化草地发展过程及草地可持续发展提供基础数据。结果表明:(1)灌丛化草地面积整体呈上升趋势,在2003年达最大,为3742.49 km~2,占研究区总面积的68.97%,2003年至2016年有小幅下降;(2)其中,重度灌丛化草地面积最大,占总面积的28.36%-49.10%,其次是占比9.77%-16.68%的中度灌丛化草地和占比5.52%-7.57%的轻度灌丛化草地;(3)30年间灌丛化草地年均扩张速度为0.74%,1995-2003年间,年均扩张速度最大,为2.16%;(4)林地和草地两种土地利用类型向灌丛化草地转化是低海拔区土地利用变化的主要类型,且由于对灌丛化草地的治理,灌丛化草地类型会转化成草地类型。
英文摘要	Bush encroachment is widely distributed in arid and semi-arid regions, and it has a serious impact on livestock production, especially in Africa where livestock is a primary source for the livelihoods of many people. In this study, methods of supervised classification and decision tree classification, and indexes of a land use change significance index (Ci) and a single land use dynamic degree, were applied to remote sensing imagery of Ethiopia for 1986-2016. The results show the dynamic characteristics of grassland bush encroachment in low altitude areas (pastures <1500 m above sea level) of Ethiopia in the 30 year period studied. The results revealed several interesting features of this phenomenon. (1) The area of bush encroachment showed an increasing trend, with a maximum of 3.74*10~3 km~2 in 2003, which represented 68.97 %of the total area, and declined slightly from 2003~2016. (2) Among classification types, the area of severe shrub grassland was the largest, accounting for 28.36-49.10 %of the total area, while the area of moderate bush encroachment accounted for 9.77-16.68%, and slight bush encroachment accounted for 5.52-7.57%. (3) The expansion rate of shrubby grassland was 0.74 %for the 30 year period, while the average annual expansion rate was 2.16 %for the 8 years from 1995-2003. (4) Forest land and grassland were the two main land use types of shrub grassland transformation in low altitude areas and bush encroachment changed large amounts of forest land into grassland due to shrub grassland management. The results of this study provide basic data for revealing the impacts of development processes on subsequent bush encroachment and can inform better management for the sustainable development of grasslands in low altitude systems.
中文关键词	灌丛化草地 ; 单一土地利用动态度 ; 土地利用变化重要性指数 ; 埃塞俄比亚低海拔区
英文关键词	bush encroachment single land use dynamic degree land use change significance index low altitude areas of Ethiopia
语种	英语
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:6253941
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/238890
作者单位	1.Xinjiang Institution of Ecology and Geography, Chinese Academy of Science;;Sino-African Joint Research Center, CAS, Wuhan Botanical Garden, Chinese Academy of Sciences, ;;, Urumqi;;Wuhan, ;; 830011;;430074; 2.Xinjiang Institution of Ecology and Geography, Chinese Academy of Science;;Sino-African Joint Research Center, CAS, Wuhan Botanical Garden, Chinese Academy of Sciences;;University of Chinese Academy of Sciences, ;;;;, Urumqi;;Wuhan;;, ;;;;Beijing 830011;;430074;;100049; 3.Xinjiang Institution of Ecology and Geography, Chinese Academy of Science;;University of Chinese Academy of Sciences, ;;, Urumqi;;, ;;Beijing 830011;;100049
推荐引用方式 GB/T 7714	邢媛媛,王永东,尤源,等. 埃塞俄比亚低海拔区灌丛化草地动态变化[J],2018,9(3):281-289.
APA	邢媛媛,王永东,尤源,&宋勤.(2018).埃塞俄比亚低海拔区灌丛化草地动态变化.资源与生态学报,9(3),281-289.
MLA	邢媛媛,et al."埃塞俄比亚低海拔区灌丛化草地动态变化".资源与生态学报 9.3(2018):281-289.